Gravity backdraft damper with galvanized steel collar and lightweight aluminum damper blades. Spring loaded for assistance in gravity closure. For optimum performance, damper should be installed in a vertical orientation. For dampers installed in a horizontal position, the hinge should be vertical

This backdraft damper has performed as expected to date. It was installed in the ductwork between the outside "flapper" and a downdraft fan. We had a tremendous amount of cold air coming into the kitchen prior to installing this damper. It was easy to install...and more imporantly, NO MORE COLD AIR. Advise though...don't expect a tight fit like other vent pipe fittings. Expect that it will be a little loose and you will need to use duct tape to secure it in place.

This backdraft damper has performed as expected to date. It was installed in the ductwork between the outside "flapper" and a downdraft fan. We had a tremendous amount of cold air coming into the kitchen prior to installing this damper. It was easy to install...and more imporantly, NO MORE COLD AIR. Advise though...don't expect a tight fit like other vent pipe fittings. Expect that it will be a little loose and you will need to use duct tape to secure it in place.

Gravity backdraft damper with galvanized steel collar and lightweight aluminum damper blades. Spring loaded for assistance in gravity closure. For optimum performance, damper should be installed in a vertical orientation. For dampers installed in a horizontal position, the hinge should be vertical